Update app.py

app.py

@@ -254,6 +254,17 @@ def reset_conversation(
 # GRADIO UI INTERFACE
 # ============================================================================
 
+def format_history_for_chatbot(history: List[Tuple[str, str]]) -> List[dict]:
+    """
+    Convert internal (question, answer) tuples into
+    Gradio v4 Chatbot message format.
+    """
+    messages = []
+    for q, a in history:
+        messages.append({"role": "user", "content": q})
+        messages.append({"role": "assistant", "content": a})
+    return messages
+
 def create_gradio_interface(vqa_engine: VisualQAEngine, session_memory: SessionMemory) -> gr.Blocks:
     """
     Create the Gradio UI for the Visual Conversational Intelligence Engine.
@@ -310,7 +321,8 @@ def create_gradio_interface(vqa_engine: VisualQAEngine, session_memory: SessionM
                 gr.Markdown("### 💬 Step 2: Ask Questions")
                 chatbot = gr.Chatbot(
                     label="Conversation History",
-                    height=300
+                    height=300,
+                    type="messages"
                 )
                 question_input = gr.Textbox(
                     label="Your Question",
@@ -330,14 +342,16 @@ def create_gradio_interface(vqa_engine: VisualQAEngine, session_memory: SessionM
             return status
         
         def ask_question_handler(question, session_id):
-            """Handle question submission event."""
-            answer, history = process_question(vqa_engine, session_memory, session_id, question)
-            return history, ""  # Return updated history and clear input
+            answer, history = process_question(
+                vqa_engine, session_memory, session_id, question
+            )
+            formatted_history = format_history_for_chatbot(history)
+            return formatted_history, ""  # Return updated history and clear input
         
         def reset_handler(session_id):
-            """Handle reset button event."""
             status, history, image = reset_conversation(session_memory, session_id)
-            return status, history, image
+            return status, [], image
+
         
         # Wire up events
         upload_btn.click(